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Multi-Way Conventional loudspeakers with crossovers

High(ish)-end MT design for top of a 3-way
High(ish)-end MT design for top of a 3-way
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Old 19th November 2019, 05:28 PM   #11
audiogod66 is offline audiogod66
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How about this baby Laniakea high end from Scan Speak
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Old 20th November 2019, 06:08 PM   #12
LineSource is offline LineSource  United States
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The 22" W-I-D-E Sonus Faber Elipsa form factor would support a sealed 12" woofer. There are a few 12" woofers like the SB_Acoustics SB34NRX75-6 which produce deep 36Hz bass in a tight transient SEALED 3+cuft cabinet.

=====
The Sonus Faber Elipsa cabinet has poor volume efficiency. A 22" wide rectangular cabinet with 2" - 3" radius on the L+R+T edges would have good directivity, and also provide extra volume for a sealed woofer. Look at the Satori based speaker named "jintani" build by Javad Shadzi as an alternative cabinet shape.

===========
Tweeter = SB_Acoustics Beryllium dome SB29BAC
--reviews agree that Beryllium sounds better. Detail of hard dome with unique natural smooth tone.

midbass= SATORI MW16P-8 for 100Hz-1.65KHz
--small 6" midrange with Sd = 118cm^2
--"MW" version in sealed 0.7cuft volume has Qtc=0.6 and Fsc = 57Hz
------crossover at 1,650Hz produces constant directivity up to (30-degree off-axsis, up to 10kHz).
------crossover to woofer below the 200Hz baffle step = use M-to-W SPL overlap to smooth BSC
--Sensitivity (2.83 V / 1 m) = 87.5db

woofer = SB_Acoustics SB34NRX75-6
--tight transient SEALED 3+cuft cabinet.
--Sensitivity (2.83 V / 1 m) = 90db
===============
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Old 21st November 2019, 01:57 AM   #13
LineSource is offline LineSource  United States
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It's getting close to ThanksGiving for our Families, and Black Friday for our wallets.

IMPLUSE PURCHASE DAY!!!

How about a 18" wide 3-way with a controlled directivity horn and a pair of side-side counter-force 12" woofers?

Ho! Ho! Ho!
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Old 21st November 2019, 05:17 AM   #14
dwk123 is offline dwk123
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Quote:
Originally Posted by LineSource View Post
The 22" W-I-D-E Sonus Faber Elipsa form factor would support a sealed 12" woofer. There are a few 12" woofers like the SB_Acoustics SB34NRX75-6 which produce deep 36Hz bass in a tight transient SEALED 3+cuft cabinet.

=====
The Sonus Faber Elipsa cabinet has poor volume efficiency. A 22" wide rectangular cabinet with 2" - 3" radius on the L+R+T edges would have good directivity, and also provide extra volume for a sealed woofer. Look at the Satori based speaker named "jintani" build by Javad Shadzi as an alternative cabinet shape.
I don't (and won't) have a Facebook account, and so have only heard Javad's name - I haven't actually seen any of his designs. The Jintani is pretty much exactly what I'm working towards, aside from the somewhat pedestrian aesthetics. If there were a kit for the Jintani, I'd be very tempted to pick it up and massage it into my target form factor.

But yes, the Elipsa has the downside that it looks big and dominating, but really doesn't give you nearly as much volume as you'd expect. This is a big part of why I ended up (tentatively) settling on the RSS265HO - they're pretty much the best small-box woofer I've run across. Since I'm crossing actively to the woofer, efficiency isn't a concern, and I can throw enough power at it to make it workable.

As for ported vs sealed - I'm still on the fence to a degree. My original plan was to use 2x RSS210HF in sealed cabinets (I'm running a single per side in 1 cu ft currently, and they work very well). The practical problem is that this doesn't make great use of available amplifier capability. In series they are an 8 ohm load which reduces available power, in parallel the impedance is too low. I do plan to compare the subjective impressions of the ported RSS265 vs the sealed RSS210. Picking up a 2nd TPA3255 amp board to drive the 2nd pair of woofers might be viable, but switching to a sealed RSS315HF is also a possibility, although the aesthetics might be a bit odd with a 5" mid. Using a 6" with the 315HF would basically be revisiting Pete Schumacher's Byzantium concept.


Okay, this is why I figured posting this might be a bad idea. Generating way too many new ideas to explore.
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Old 21st November 2019, 10:18 AM   #15
Lojzek is offline Lojzek  Croatia
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Hi dwk123,

I suppose you'd be better served building a fully active dsp controlled 3 way speaker. My reasoning is if you feel confident to build a hybrid one with only one xo point, you should be able to do the same with mid/tw xo point, which is even an easier task. Pick up the higher quality units of your preference so you can be happy with these. Waveguided tweeters may be a better solution when paired with larger cone drivers, not so with smaller ones.
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Old 21st November 2019, 12:45 PM   #16
dwk123 is offline dwk123
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Quote:
Originally Posted by Lojzek View Post
Hi dwk123,

I suppose you'd be better served building a fully active dsp controlled 3 way speaker. My reasoning is if you feel confident to build a hybrid one with only one xo point, you should be able to do the same with mid/tw xo point, which is even an easier task. Pick up the higher quality units of your preference so you can be happy with these. Waveguided tweeters may be a better solution when paired with larger cone drivers, not so with smaller ones.
The problem is that I already have the MiniDSP SHD, which is limited to a 2-way setup. This is for our main living room, and so it needs to be wife/family friendly, and despite having experimented with full-blown DSP systems for a long time, getting one that is suitable for use by my wife remains a challenge. the SHD is the compromise solution, and is what is driving me to a hybrid xover. This arrangement also takes advantage of my Neurochrome Parallel-86 amp - it can drive the M/T section and I don't have to come up with another high quality amp.
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Old 21st November 2019, 01:17 PM   #17
audiogod66 is offline audiogod66
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Quote:
Originally Posted by dwk123 View Post
I don't (and won't) have a Facebook account, and so have only heard Javad's name - I haven't actually seen any of his designs. The Jintani is pretty much exactly what I'm working towards, aside from the somewhat pedestrian aesthetics. If there were a kit for the Jintani, I'd be very tempted to pick it up and massage it into my target form factor.

But yes, the Elipsa has the downside that it looks big and dominating, but really doesn't give you nearly as much volume as you'd expect. This is a big part of why I ended up (tentatively) settling on the RSS265HO - they're pretty much the best small-box woofer I've run across. Since I'm crossing actively to the woofer, efficiency isn't a concern, and I can throw enough power at it to make it workable.

As for ported vs sealed - I'm still on the fence to a degree. My original plan was to use 2x RSS210HF in sealed cabinets (I'm running a single per side in 1 cu ft currently, and they work very well). The practical problem is that this doesn't make great use of available amplifier capability. In series they are an 8 ohm load which reduces available power, in parallel the impedance is too low. I do plan to compare the subjective impressions of the ported RSS265 vs the sealed RSS210. Picking up a 2nd TPA3255 amp board to drive the 2nd pair of woofers might be viable, but switching to a sealed RSS315HF is also a possibility, although the aesthetics might be a bit odd with a 5" mid. Using a 6" with the 315HF would basically be revisiting Pete Schumacher's Byzantium concept.


Okay, this is why I figured posting this might be a bad idea. Generating way too many new ideas to explore.
Don't look too much at Javads loudspeakers you may just give up making them his are that good ! His workshop seems to have everything and he has the skills to fully utilize it.
As for driving 2 sealed 10 or 12 inch a side a Crown for $500 will hammer a 2 ohm load that's not much of an issue anymore - just do it let the neighbors feel those Kodo drums as if there in Japan 😁
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Old 21st November 2019, 01:22 PM   #18
Lojzek is offline Lojzek  Croatia
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dwk123,

will you put the parts of a 2 way kit on the SF Elipsa like baffle or as specified in the kit?
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